<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Untitled Page</title>
</head>
<body>
<style>
#select_container {
width:120px;
/*height:125px;*/ /* IE */
overflow:auto; /* or 'scroll' */
border:1px solid grey;
}
</style>
<div id="select_container" style="overflow-x:scroll; width:120px; overflow: -moz-scrollbars-horizontal;">
<select multiple name="mySelect" size="3">
<option value="1">one two three four five six</option>
<option value="2">seven eight</option>
<option value="3">nine ten</option>
<option value="4">one two three four five six</option>
<option value="5">seven eight</option>
<option value="6">nine ten</option>
</select>
</div>

</body>
</html>
